<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
    <title>姓名案例-计算属性实现</title>
</head>

<body>
    <div id="root">
        姓： <input type="text" name="xing" id="xing" v-model="firstname"> <br/> 名： <input type="text" name="ming" id="ming" v-model="lastname"> <br/> 全名：
        <span>{{fullname}}</span>
    </div>
    <script>
        const vm = new Vue({
            el: "#root",
            data: {
                firstname: '张',
                lastname: '三'
            },
            computed: {
                //完成写法
                // fullname: {                  
                //     get() {
                //         console.log(this); //此处的this指定的是vue对象
                //         return this.firstname + "-" + this.lastname;
                //     },
                //     set(value) {
                //         const arr = value.split("-");
                //         this.firstname = arr[0];
                //         this.lastname = arr[1];
                //     }
                // }

                //简写
                fullname() {
                    console.log(this); //此处的this指定的是vue对象
                    return this.firstname + "-" + this.lastname;
                }
            }
        })
    </script>
</body>

</html>